import java.util.*;


public class LotteryOdds {

  public static void main(String[] args) {
    Scanner in = new Scanner(System.in);

    System.out.print("How many numbers do you need to draw? ");
    int k = in.nextInt();

    System.out.print("What is the highest number you can draw? ");
    int n = in.nextInt();

    int lotteryOdds = 1;
    for (int i = 1; i <= k; i++)
      lotteryOdds = lotteryOdds * (n - i + 1) / i;

    System.out.printf("Your odds are 1 in %d. Good Luck!\n", lotteryOdds);
  }

}
